Accustomed though we are to speaking of the films made before 1927 as "silent", the film has never been, in the full sense of the word, silent. From the very beginning, music was regarded as an 1accompaniment: when the Lumiere films were shown at the first public film exhibition in the United States in February 1896, they were 2by piano improvisations(即兴创作)on popular tunes. At first, the music played 3no special relationship to the films: an accompaniment of any kind was 4. Within a very short time, however, the incongruity(不协调)of playing lively music to a 5film became apparent, and film pianists began to take some care in 6their pieces to the mood of the film. As movie theaters grew in number and importance, a violinist, and perhaps a cellist, would be added to the pianist in certain 7, and in the larger movie theaters small orchestras were formed. For a number of years the selection of music for each film program 8entirely in the hands of the conductor or leader of the orchestra, and very often the principal 9for holding such a position was not skill or taste so much as the ownership of a large personal library of musical pieces. Since the conductor seldom saw the films until the night before they were to be shown, the musical arrangement was 10improvised in the greatest hurry.A)sufficient B)incredible C)accompanied D)comparativelyE)matching F)rested G)normally H)occasionsI)bore J)qualification K)solemn L)indispensableM)severe N)according O)cases